The present invention relates to a heating device for a motor vehicle with a dual-voltage vehicle electrical system. The heating device is operated with a power supply from the sub-system with the higher nominal voltage (for example 48 V), but actuated by a control device in the sub-system with the lower nominal voltage (for example 12 V). For this purpose, the heating device has a supply connection in the sub-system with the higher nominal voltage and a control connection in the sub-system with the lower nominal voltage. The control connection is disposed in particular on a control device which is integrated into the heating device and which is connected to a control connection of a switching element (power semiconductor) for controlling the heating device via a capacitive separating element in order to ensure potential isolation of the two sub-systems.
Electric Heating Device for a Motor Vehicle
2021-05-27
Patent
Elektronische Ressource
Englisch
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / H03K PULSE TECHNIQUE , Impulstechnik |
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